<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react资料_stu//依赖包/react.development.js"></script>
    <script src="../react资料_stu//依赖包/react-dom.development.js"></script>
    <script src="../react资料_stu//依赖包/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        /* 
      porps是用来做父子组件通信的
        - 在父组件中使用子组件的时候,可以给子组件添加属性
        - 在子组件中组件实例的props属性上,就能拿到这个属性和值
    
    */
   class App extends React.Component{
    state={
        car:'八手三轮'
    }
    render(){
        const{car}=this.state
        return(
            <div>
            <h1>我是父亲</h1>
            <p>我开的车是{car}</p>
            <hr/>
            <Box a={1} car={car}/>
            </div>
        )
    }
   }
   class Box extends React.Component{
    render(){
        const {car}=this.props;
        return(
        <p>我是儿子组件，我开我老子的车{car}</p>
        )
    }
   }
   ReactDOM.createRoot(document.getElementById('app')).render(<App/>)
    </script>
</body>
</html>